Stochastic-resonant spatiotemporal patterns in a FitzHugh?Nagumo ring

N. MARTINEZ; L. VASALLO; G. V. SAVINO; C. M. FORMIGLI; A.D. SANCHEZ; G.G. IZÚS; M. G. DELL'ERBA; R. R. DEZA

Maceió

Conferencia; MEDYFINOL 2014; 2014

Comité Internacional

We study the synchronization properties of a ring of excitable FitzHugh?Nagumo cells, when nearest-neighbor units are coupled either diffusively through their inhibitor fields, or antidiffusively through their activator fields. The system is submitted to a common subthreshold adiabatic signal S(t), and independent Gaussian white noises with common variance . The germ of the numerically observed stochastic-resonant spatiotemporal self-organization of the excitation activity, is captured in a two-cell model for which both analytical and experimental results are discussed.